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another question for my friends truck

Discussion in 'Chevy Silverado Forum (GMC Sierra)' started by 5speedsilverado, May 20, 2009.

  1. 5speedsilverado

    5speedsilverado Epic Member 5+ Years 1000 Posts

    ok as you probably know my friend has a 2004 gmc sierra with the 4.3l v6 now it has hit 100+ degrees out side and you have to use the air conditioning alot now. we havee to use the air conditioning for an extended time, his truck will stall he took it to a mechanic and They said that it is because of dust and stuff since we live in a desert. im thinking it is just an air filter, but the mechanic should have know that. so now im looking for your opinions. idk what the stuff is though??
  2. 5speedsilverado

    5speedsilverado Epic Member 5+ Years 1000 Posts

    also it dies both at idle and at highway speeds.
  3. MrShorty

    MrShorty Epic Member Staff Member 5+ Years 1000 Posts

    Not enough to go on. A few things I'd look at next:

    1) Fuel pump cutting out or losing power/ground?
    2) Any codes in the computer (pending or otherwise)? sometimes that will give ideas.
    3) When it stalls, is it sputtering/stumbling and then stalling, or is it more like someone turned the key off?
    4) Will it start right back up? If not, some of things may be easier to check after it stalls.
  4. 5speedsilverado

    5speedsilverado Epic Member 5+ Years 1000 Posts

    i haven't had a chance to look at it, i know that it starts right back up

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